// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CC_LAYERS_TEXTURE_LAYER_IMPL_H_
#define CC_LAYERS_TEXTURE_LAYER_IMPL_H_

#include <string>

#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/ptr_util.h"
#include "cc/base/cc_export.h"
#include "cc/layers/layer_impl.h"

namespace cc {
class SingleReleaseCallbackImpl;
class ScopedResource;

class CC_EXPORT TextureLayerImpl : public LayerImpl {
public:
    static std::unique_ptr<TextureLayerImpl> Create(LayerTreeImpl* tree_impl,
        int id)
    {
        return base::WrapUnique(new TextureLayerImpl(tree_impl, id));
    }
    ~TextureLayerImpl() override;

    std::unique_ptr<LayerImpl> CreateLayerImpl(
        LayerTreeImpl* layer_tree_impl) override;
    bool IsSnapped() override;
    void PushPropertiesTo(LayerImpl* layer) override;

    bool WillDraw(DrawMode draw_mode,
        ResourceProvider* resource_provider) override;
    void AppendQuads(RenderPass* render_pass,
        AppendQuadsData* append_quads_data) override;
    SimpleEnclosedRegion VisibleOpaqueRegion() const override;
    void ReleaseResources() override;

    // These setter methods don't cause any implicit damage, so the texture client
    // must explicitly invalidate if they intend to cause a visible change in the
    // layer's output.
    void SetTextureId(unsigned id);
    void SetPremultipliedAlpha(bool premultiplied_alpha);
    void SetBlendBackgroundColor(bool blend);
    void SetFlipped(bool flipped);
    void SetNearestNeighbor(bool nearest_neighbor);
    void SetUVTopLeft(const gfx::PointF& top_left);
    void SetUVBottomRight(const gfx::PointF& bottom_right);

    // 1--2
    // |  |
    // 0--3
    void SetVertexOpacity(const float vertex_opacity[4]);

    void SetTextureMailbox(
        const TextureMailbox& mailbox,
        std::unique_ptr<SingleReleaseCallbackImpl> release_callback);

private:
    TextureLayerImpl(LayerTreeImpl* tree_impl, int id);

    const char* LayerTypeAsString() const override;
    void FreeTextureMailbox();

    ResourceId external_texture_resource_;
    bool premultiplied_alpha_;
    bool blend_background_color_;
    bool flipped_;
    bool nearest_neighbor_;
    gfx::PointF uv_top_left_;
    gfx::PointF uv_bottom_right_;
    float vertex_opacity_[4];
    // This is a resource that's a GL copy of a software texture mailbox.
    std::unique_ptr<ScopedResource> texture_copy_;

    TextureMailbox texture_mailbox_;
    std::unique_ptr<SingleReleaseCallbackImpl> release_callback_;
    bool own_mailbox_;
    bool valid_texture_copy_;

    DISALLOW_COPY_AND_ASSIGN(TextureLayerImpl);
};

} // namespace cc

#endif // CC_LAYERS_TEXTURE_LAYER_IMPL_H_
